#include <stdio.h>
#include <string.h>

int main() {
    char s1[] = "a";
    char s2[] = "A";
    char s3[] = "ab";

    printf("compare s1 s2: %d\n", strcmp(s1, s2));
    printf("compare s2 s1: %d\n", strcmp(s2, s1));
    printf("compare s1 s3: %d\n", strcmp(s1, s3));
    printf("compare s2 s3: %d\n", strcmp(s2, s3));

}
